<template>
  <div class="login-container">
    <!-- 左边 -->
    <div class="logo" />
    <!-- 右边 -->
    <div class="form">

      <div v-if="toggle===1">
        <h1>手机号登录</h1>
        <el-card shadow="never" class="login-card">
          <!--登录表单-->
          <el-form ref="loginRef" :model="loginForm" :rules="loginRules">
            <el-form-item prop="mobile">
              <el-input v-model="loginForm.mobile" placeholder="请输入手机号" />
            </el-form-item>
            <el-form-item prop="password">
              <el-input v-model="loginForm.password" placeholder="请输入密码" />
            </el-form-item>
            <el-form-item prop="isAgree">
              <el-checkbox v-model="loginForm.isAgree">用户平台使用协议</el-checkbox>
            </el-form-item>
            <el-form-item>
              <el-button style="width:350px" type="primary" @click="login">登录</el-button>
            </el-form-item>
          </el-form>
        </el-card>
      </div>
      <div v-else-if="toggle === 2" class="qrcode-login">
        <h1>二维码登录</h1>
        <!-- 二维码 需要使用canvas的dom对象 -->
        <div v-if="codeState === 2" class="qrcode-layer scan_success">
          <span>用户已扫码</span>
          <i class="el-icon-check" />
        </div>
        <div v-else-if="codeState === 4" class="qrcode-layer timeout" @click="createCode">
          <span>二维码失效</span>
          <i class="el-icon-refresh-right" />
        </div>
        <div v-else-if="codeState === 5" class="qrcode-layer timeout" @click="createCode">
          <span>用户已取消</span>
          <i class="el-icon-refresh-right" />
        </div>
        <canvas ref="qrcodeCanvas" />
      </div>
      <div>
        <el-button type="text" @click="toggle=1">手机号登录</el-button>
        <el-button type="text" @click="toggleQR">扫码登录</el-button>
      </div>
    </div>
  </div>
</template>

<script>
import { getQRcodeApi, getQRcodeTypeApi } from '@/api/user'
import QrCode from 'qrcode'
export default {
  name: 'Login',
  data() {
    return {
      codeState: 1,
      QRcode: '',
      toggle: 1,
      loginForm: {
        mobile: process.env.NODE_ENV === 'development' ? '13800000002' : '',
        password: process.env.NODE_ENV === 'development' ? 'hm#qd@23!' : '',
        isAgree: process.env.NODE_ENV === 'development'
      },
      loginRules: {
        mobile: [
          { required: true, message: '请输入手机号', trigger: 'blur' },
          { pattern: /^1[3-9]\d{9}$/, message: '手机号格式不正确', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 16, message: '密码长度应该为6-16位之间', trigger: 'blur' }
        ],
        isAgree: [
          {
            validator: (rule, value, callback) => {
              // rule规则
              // value检查的数据 true/false
              // callback 函数 执行这个函数
              // 成功执行callback 失败也执行callback(错误对象 new Error(错误信息))
              value ? callback() : callback('没有勾选用户平台协议')
            }
          }
        ]
      }
    }
  },
  async created() {

  },
  beforeDestroy() {
    clearInterval(this.timer)
  },
  methods: {
    clear() {
      if (this.toggle === 1) {
        clearInterval(this.timer)
      }
    },
    getQRcodeType() {
      const checkState = async() => {
        try {
          const { codeState, token } = await getQRcodeTypeApi({ qrcode_key: this.QRcode })
          console.log(this.qrCodeKey)
          this.codeState = codeState // 存储状态
          if (this.codeState === 4 || this.codeState === 5) {
            clearInterval(this.timer)
          } else if (this.codeState === 3) {
            clearInterval(this.timer)
            this.$store.commit('user/setToken', token)
            this.$router.push('/')
          }
          console.log(codeState, token)
        } catch (error) {
          // 处理错误
          clearInterval(this.timer)
        }
      }
      // 记录当前的标记
      this.timer = setInterval(() => {
        // 检查逻辑
        checkState()
      }, 1000)
    },
    toggleTitle() {
      return this.toggle === 1 ? '手机号登陆' : '扫码登陆'
    },
    async   toggleQR() {
      this.toggle = 2
      await this.getQRcode()
      this.createCode()
      this.getQRcodeType()
    },
    createCode() {
      this.codeState = 1 // 此时重新开始
      QrCode.toCanvas(this.$refs.qrcodeCanvas, this.QRcode, {
        width: 300,
        height: 300
      })
    },
    async getQRcode() {
      const res = await getQRcodeApi()
      this.QRcode = res
      // console.log(res)
    },
    // 1. 登录
    async login() {
      // 1.1 整体校验
      await this.$refs.loginRef.validate()
      // 1.2 派发登录异步任务
      const { mobile, password } = this.loginForm
      this.$store.dispatch('user/login', { mobile, password })
    }
  }
}
</script>

<style lang="scss" scoped>
.login-container{
  display: flex;
  align-items: stretch;
  height: 100vh;
  .logo {
    flex: 3;
    background: rgba(38, 72, 176) url(../../assets/common/login_back.png) no-repeat center / cover;
    border-top-right-radius: 60px;
  }
  .form {
    flex: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-left: 176px;

    .el-card {
      border: none;
      padding: 0;
    }

    h1 {
      padding-left: 20px;
      font-size: 24px;
    }

   ::v-deep .el-input {
      width: 350px;
      height: 44px;
      .el-input__inner {
        background: #f4f5fb;
      }
    }

    ::v-deep .el-checkbox {
      color: #606266;
    }
  }
}
</style>
